The Rohde & Schwarz FSH3 is a handheld spectrum analyzer engineered for field and laboratory signal investigations across 100 kHz to 3 GHz. It delivers precision measurements for mobile radio base station installation and maintenance, on-site cable fault location, RF development, and field service work. The FSH3 combines portable form factor with advanced measurement capabilities including spectrum analysis, cable and antenna testing, digital mobile radio standard analysis, and optional distance-to-fault measurements.
Technical Specifications
Frequency Performance
• Frequency range: 100 kHz to 3 GHz
• Displayed Average Noise Level (DANL): typically −114 dBm (1 kHz RBW), typically −135 dBm (100 Hz RBW)
• Third Order Intercept (TOI): typically 13 dBm
• SSB Phase Noise: < −100 dBc (1 Hz) at 100 kHz from carrier
• Input Impedance: 50 Ω
• VSWR (10 MHz to 3 GHz): 1.5 typ.
Resolution and Video Bandwidth
• Resolution Bandwidth: 100 Hz to 1 MHz (selectable by model)
• Video Bandwidth: 10 Hz to 1 MHz
• Level Measurement Uncertainty: typically 0.5 dB to 1.5 dB
Display and Interface
• TFT color display: 320 × 240 pixels, transflective and backlit
• Monochrome mode available for direct sunlight operation
• RF Input: N connector (female)
• RS-232-C optical interface
Detectors
Sample, max/min peak, auto peak, and RMS detection modes.
– Key Features
• Multiple detection modes for diverse signal analysis requirements
• Internal preamplifier (models .03 and .23): 100 kHz to 3 GHz for low-signal measurements
• Optional tracking generator (models .13 and .23): −20 dBm output (model .13); −20 dBm/0 dBm selectable (model .23)
• Scalar and vector transmission measurement capability
• Distance-to-fault and cable loss measurement support
– Measurement Capabilities
• Spectrum analysis and power measurement with external sensors
• 3GPP WCDMA, cdmaOne, and CDMA2000 1x pre-defined digital mobile radio measurements
• Channel-power and field-strength measurements
• Cable and on-site antenna characterization
– Compatibility & Integration
Supports external power sensors (e.g., R&S FSH-Z1) and integrates via RS-232-C optical interface for remote control and data logging.
